Carton and method of manufacturing same



March 23,1937, 5. BERGSTEIN CARTON AND METHOD OF MANUFACTURING SAME Filed April 7, 1933 2 Sheets-Sheet l INVENTOR.

ATTORNEY;

March 23, 1937. I s; BERGSTEIN 2,074,357 CARTON AND METHOD OF MANUFACTURING SAME v Filed April 7, 1935 2 Sheets-Sheet 2 INVENTOR. V

ATTORNEYS Patented Mar. 23, 1931 TUNITED s'TAT Es' PATENT OFFICE 1 CARTON AND METiIOD F MANUFACTUR- ING SAME- Samuel Bergstein, Cincinnati, Ohio Appllcation Api-il '7, 1933, Serial No. 664,948

11 claims.

My invention relates to grease-proof, air-proof provide forms or blocks of a size suitable to extend through the dispensing or 'filling opening, 15 so that the flaps of the carton at the other end thereof may be supported during the interval when the flaps are being closed and sealed.

In my application, Serial No. 652,979 filed January 23, 1933, I have disclosed a method of setting up cartons having end closure flaps with a registering opening extending therethrough.in which the closure flaps having the opening are first sealed on a block and in which a block is then inserted through the opening'to support the closure flaps at .the other end of the carton during the time when those closure flaps are sealed. As will be observed by reference to the afore- 'noted application, I preferably provide for the carton referred to, a friction cap which seats within the opening in the closure flaps. The method of supporting the carton during the sealing operation is substantially the same in the afore-noted application, and in my present invention, excepting that in my present invention I propose to form an additional flap at the end of the carton having the dispensing or filling opening, which can be folded down and sealed after the carton is filled, and which may also have lines of partial perforations in the last noted closure fiap which may register with the dispensing opening so that a novel type of dispensing carton may be provided.

In the sealing of cartons to make them greaseproof, water-proof and air-proof, Ihave in my several co-pending applications, Serial No. 628,566, filed August 12, 1932, now Patent No. 1,974,256 and Serial No. 666,700, filed April 18, 1933, nowPatent No. 2,006,168, disclosed several methods of applying thick beads of adhesive,

- preferably adhesive having a latex base, which is consequently elastic, to fill out indentations at the ends of the closed flaps. In the above noted applications, I have" further disclosed a novel method of securing a tight wrapped package. In

order to insure complete sealing of closure flaps particularly when excess adhesive is applied to certain areas, it is matter of great importance that the flaps have an adequate support during the interval when the flaps first begin to adhere together. It is an object of my invention therefore, to provide a novel carton which will have closure flaps which may be sealed at both ends withthe fiaps supported and to have the first of the closure flaps to be sealed with the final closing fiap, which will firmly adhere because, of the fact that the remaining closure flaps at that end of the carton had been supported during the interval when they were sealed.

In further explanation of the foregoing, if a carton has four closure flaps at each end and three of the closure flaps are overlapped and sealed together while they are being supported y flaps at one end have a filling or dispensing opening of insufiicient size to insert a block through the opening, which will support the fiaps at the other end of the carton, and in whicha novel type of collapsible support is inserted which folds down so as to support the closure fiaps throughout a substantial portion of their area, which support moves back to collapsed position for withdrawal through the opening in the closure flaps.

The above objects and other objects to which reference will be made in the ensuing disclosure, I accomplish by that certain combination and arrangement of parts, and by utilizing the certain process steps in connection with the types of cartons employed which is hereinafter described.

Referring to the drawings: a

Figure 1 is a plan view of a carton having the closure flaps in fiat position.

vFigure 21s a perspective view of the blank shown in Figure 1, showing a supporting block within a carton during the time certain of the closure flaps are being sealed.

Figure 3 is a perspective view of another step in the closure fiap sealing operation.

Figure 4 is a perspective view of the carton shown in Figures 2 and 3, after its removal from the bio k shown in Figure 3. v

Figure 5 is a plan view of aslightly modified type 6 of carton.

Figure 6 is a perspective view of the blank shown in Figure 5 during the initial sealing of the closure flaps at one end.

Figure 7 is a perspective view of my novel col- 1 lapsing sealing flap support with a carton in place thereon.

Figure 8 is a perspective view of the carton shown in Figure 7 after its removal from the block.

15 Figure 9 is a side elevation of parts in section of the collapsing support used for sealing the carton illustrated in Figures to 8.

Figure 10 is a side elevation with parts in section, showing the collapsing support in position for removal from the carton.

In Figure 1, I have shown a carton having a body I, with top closure flaps consisting of a side flap 2a having an elliptical cut-out portion 2b therein, and end closure portions 3a having semi-elliptical cut-out portions 31; therein. The other top closure fiap is plain side wall closing flap 4. While I have referred to the closure flaps as top closure flaps, this is merely for distinguishing them from the bottom closure flaps which are indicated in the drawings at 5a, 5b and 6a., 6b, these flaps being the usual side and end closure flaps.

In Figure 2 I have illustrated the first carton setup operation in which the carton having the body walls I, is opened up into rectangular position and inserted on a block I, which has dimensions slightly less than the internal dimensions of the carton in opened-up position. The end closure flaps 3a are first folded in against the top of the block and the side wall flap 2a. is then folded in and adhesively secured to the top surface of the end flaps. In this position it will be noted that the elliptical opening 2b in the flap 211 will register with the semi-elliptical openings 3b in the end closure flaps so that a semi-elliptical opening will be provided in the sealed flaps referred to. At this stage in the set-up of the carton it will be noted that the sidewall flap 4 is not folded in and sealed, as the final closing of the carton does not occur until after the contents are inserted therein.

The carton is then removed from the block I and inverted and placed on a block which is semielliptical in section corresponding to the size and shape of the opening in the top closure flaps. The bottom closure flaps 5a, 5b and 6a., 6b are next folded in and sealed, and in this operation I preferably distribute beads of adhesive which will fill in the spaces under the side wall flaps Sa-and 5b in accordance with the invention set forth in my application, Serial No. 628,566, filed August 12, 1932, or in accordance with the modified disclosure set forth in my previously mentioned application, Serial No. 666,700 filed April 18th, 1933. The carton shown in Figure 4 is ready for filling and the contents of the carton may be inserted through the opening 3b, after which the flap 4 is folded down and sealed. Since the flaps 2a, id have been scaled on a block, they will provide the same rigid support for the closing fiap 4 as if the block were actually within the carton, since the sealing of unsupported closure flaps is not as satisfactory as if the flaps are supported, because the give downwardly of the flaps prevents a complete surface contact sealing engagement of the flaps, and when they are once sealed on a block support they do not tend to give inwardly. During the application of adhesive to the under surface of the closure fiap 4, or to the upper surface of the closure flap 2a, beads of adhesive as indicated by the dotted lines 9 may be applied at the side edges of the flaps so that the space at the end and corner edges of the flaps may be filled in to prevent the tearing or puncturing of outer wrappers in case the carton is subsequently tight wrapped.

In Figures 5 to 8, I have illustrated the forming and sealing of a. slightly modified type of carton. In this modification the carton has body walls l0, bottom closure flaps consisting of the side wall closing flaps Ii, Ila, and the end wall closing flaps i2, I211.

The top wall closing flaps comprise a side wall closing flap l3 having a circular opening l4, set slightly off-center in the flap. There is an end wall closing flap i6 having a semi-circular opening I6 therein, which when the flaps l3 and I5 are folded over will register with the opening l4.

.The other top end wall closure flap I1 is not provided with any opening. In this modification there is also the side wall closing flap i8 which is not folded in and sealed until the contents of the carton have been inserted through the opening provided by the registering of the openings l4 and i6.

In sealing this modified type of carton, the blank is opened up and positioned on a block iii. The end flaps are then folded in, adhesive is applied either to the top of the end flaps or to the under-surface of the side wall flap i3 and the side wall flap I3 is folded in and sealed, pressure ordinarily being applied which presses the flaps together against the top surface of the blank i9.

It will be obvious that the opening caused by the cut-out portions i4 and IE will not be ample to admit the insertion therethrough of a block which will adequately support the bottom closing flaps when they are sealed, so for supporting the bottom closing fiaps I provide a novel type of collapsible block such as is indicated in Figures '7, 9 and 10.-

Referring to Figures 9 and 10, I have shown a block formed by a hollow rod 20, having bifurcated portions which seat a pivot pin 2i. An elongated block 22 is pivoted at 2| to the support 20, and a spring 23 which is secured in an extension 24 of the block 22 causes it to be normally pulled back to a position such as is indicated in Figure 10, in which position it may be inserted through the opening in the top closure flaps.

In using this type of collapsing block, the block is first inserted through the opening and as the end flaps are folded down, the block 22 is also folded down, but because of its abutment against the upper edge 25 of the support 20, it will not fold to further than a right-angled position in which the end flaps I2, I21: may be folded in and the side wall flaps II, Ila have been folded in on top of the end wall flaps. The carton then assumes the position indicated in Figure 7. As the carton is withdrawn from the, block the support 22' is pulled up so that it extends in alignment with the support 20, and the block may then be removed from the carton.

The carton then assumes the position indicated in Figure 8. The contents may then be inserted through the filling opening I4, and as a convenient method of providing a dispensing opening, the flap l8 may be provided with semi-perforated or dotted lines, as indicated at 26, which will ton other modifications in the position of the 3 opening in the closing flaps will readily occur to others skilled in this art. 1 While I have illustrated the various forms on i which the'cartons may be set up and sealed for hand-operation, it will be understood that this is merely to simplify the disclosure of the principle of the method involved and that in actual use the cartons will be made on semi or automatic carton sealing machines of desired type. Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. The method of preparing a carton with the contents therein which consists in providing a carton having some of the end closure fiaps thereof provided with an opening, said flaps being adapted to be folded over and sealed to form an imperforate barrier with the exception of the opening, said carton having a closure flap at the end noted having the opening, which is imperforate, forming up and sealing the first noted flaps having the opening on an internal support, then inverting the carton and inserting an internal support through the opening, and sealing closure flaps at the other end of the carton on said support, then reinverting the carton and inserting the goods to be packaged therein through the opening, and subsequently folding down and sealing the second noted closure flap. 2. The method of preparing a carton with the contents therein which consists in closing and sealing certain end closure flaps of a container on an internal support, said closure flaps having an opening extending therethrough, then folding in and sealing the closure fiaps at the other end of the container on a support extended through the opening in the closed fiaps at the first noted end of the container, withdrawing the support through the opening, filling the goods to be pack-' aged into the container through the opening and then folding down and sealing an imperforate flap at the first noted end of the container.

3. The method of preparing a carton with the contents therein which consists in closing and .50 sealing certain end closure flaps at one end of a container or an internal support, said closure flaps having an opening extending therethrough, then inverting and positioning the container on an expansible and contractible support, expanding the support, folding over and sealing the flaps at the end opposite the first noted end of the container, contracting the support and withdrawing the container therefrom, inserting the contents into the container through the opening, and then sealing against the opening a flap which closes the same.

4. The method of preparing a carton with the contents therein which consists in closing and sealing certain end closure flaps at one end of a container on an internal support, said closure flaps having an opening extending therethrough,

'then inverting and positioning the container on an 'expansible and contractible support, expand- 70 ing the support, folding over and sealing the flaps at the end opposite the first noted end of the container contracting the support and withdrawing the container therefrom, inserting the contents into the container through the opening and then the same, said last noted flap being of suificient size to coverthe flaps having the opening therein. 5. The method of preparing a carton with the contents therein which consists in closing and sealing certain end closure flaps at one end of a container on an. internal support, said closure then withdrawing the container from said support and positioning it on another support which I extends through'the opening and supports the flaps at the other end of the container while its closing flaps are folded down and sealed, then withdrawing the container from the second noted support, inserting the contents into the container through the opening in the first noted closure fiaps, and finally sealing against the flaps having the opening a flap which closes the same.

6. The method of preparing a carton with the contents therein which consists in closing and the opening a flap which closes the same, said last noted fiap being of sufiicient size to cover the fiaps having the. opening therein.

7. The method of preparing a carton with the contents therein which consists in closing and sealing certain end closure flaps at one end of a container on an internal support, said closure flaps having an opening extending therethrough, then withdrawing the container from said support and positioning it on another support which extends through the opening and supports the flaps at the other end of the container while its closing flaps are folded down and sealed, then withdrawing the container from the second noted support, inserting the contents into the container throughthe opening in the first noted closure flaps, and finally sealing against the flaps having the opening a. flap which closes the same, said fiap being articulated to the container at the end having the opening.

8. The method of preparing a carton with the contents therein which consists in closing and sealing certain end closure fiaps at one end of a container on an internal support, said closure flaps having an opening extending therethrough, then withdrawing the container from said support and positioning it on another support which extends through the opening and supports the flaps at the other end of the container while its closing flaps are folded down and sealed, then withdrawing the container from the second noted support, inserting the contents into the container through the opening in the first noted closure fiaps, and finally closing the opening, said last noted flap being of-sufficient size to cover the fiaps having the opening therein.

9. The method of preparing a sealed package of a commodity which comprises forming a carton with a plurality of flaps to interlap at each end thereof, and forming a. plurality of the flaps that are to lie under another one of the flaps at one end to leave an opening, leaving the opposite end flaps open, applying an internal support through said end with said flaps open, closing flaps having an opening extending therethrough,

and sealing the flaps with the aid of said support to leave the opening at said first-noted end, applying an internal support through the opening in said flapsat the first-noted end, closing and sealing the flaps with the aid of the internal support applied as last mentioned at the opposite end to completely close said opposite end, then inserting the commodity through said opening, and then closing and sealing said other one of said flaps across said opening.

10. A carton having ends formed of interlapping flaps uniformly adhering together substantially throughout the respective end areas of the carton and closing said ends except, at one end, an opening to admit material to the interior of the carton, and a flap hinged to one side of said one end to fold across said end and close said opening after the material is admitted, and to be uniformly adhered to said end, certain of said flaps, when adhered together, having the spaces at their edges and corners filled with adhesive exceeding in thickness the film of adhesive that secures the flaps together, to insure sealing of said spaces and to rigidly support the carton material adjacent to said spaces and thereby prevent tearing or puncturing of material applied to a surface of the carton, and consequent seepage or leakage 01 contents from the carton.

11. The method of preparing a carton to receive its contents, which carton has closure flaps at its opposite ends, with some flaps at one end formed and related to leave an opening in said one end when the flaps are closed and sealed, and another-flap to be closed over the opening at said one end, which method comprises closing the flaps at said one end, to form the opening, with the aid oi a support inserted from the opposite end, and then inserting through the opening at said one end a supporting device that is adapted to have its shape changed from a straight extension easily entering said opening, to a cross extension after entering, and closing the flaps at said opposite end with the aid of the cross extended device as a support, and then restoring the straight extension of said device and withdrawing it through said opening, leaving the carton ready for access to its interior through said opening, and for closing the opening by said other flap at said one end.

SAMUEL BERGS'I'EIN. 

